Ernst lindner



(No Model.)

B. LINDNER.

ATTACHMENT FOR TURNING LATHES.

No. 377,079. Patented Jan. 31, 1888.

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ATTORNEY N lTE s ERNST LINDNER, OF NEXV YORK, N. Y., ASSIGNOR OFONE-HALF TO THE E. P. GLEASON MANUFACTURING COMPANY, OF SAME PLACE.

ATTACHMENT FOR TURNING-LATHES.

SPECIEICATION forming part of Letters Patent No. 377,079, dated January31, 1888.

Applicatiui filed May 9, 1887. Serial No. 237,661.

To all whom it may concern.-

Be it known that I, ERNST LINDNER, a citizen of the United States, and aresident of the city of New York, county and State of New York, haveinvented a new and useful Improvementin Attachments forTurning-Lathes,of which the following is a specification.

My invention appertains to turning-lathes, more especially of that classwhich are constructed with a hollow spindle in the live-head; but itisapplicable to all kinds of lathes, and the object of it is theproduction of an attachable mechanism which will increase the capacityfor mechanical operation or production of the lathe to which it may beattached.

My invention consists in the arrangement of sliding tool-holders on avertical plate having a guiding center, so that the tool held willmaintain the same angle in relation to the center at all points of itsadvancement thereto; also, the means by which two tools are operated byone lever,together with such new combinations and arrangements of partsas will more fully appear, reference being had to the followingspecifications, of which the accompanying drawings form apart, in which-Figure 1 is a vertical face view of the side of the plate toward thesliding head, a part being broken from one of the side flanges to showparts beneath. Fig. 2 is a horizontal central sectional view in which isshown a sectional view out through on the dotted line 00 3 of oneiof thetool-holders and its guidingflanges.

Likeletters refer to like parts in each figure.

A is a base-plate provided with suitable gniding-flanges,a a, and othermeans for securing it in position on the shears or bed of aturning-lathe. Firmly fixed to this base A is a vertical plate, 13, ofsuitable height, width, and thickness. At a central position in thisplate B a socket-hole, b, is made through it,so as to adapt it toreceive and hold one of several interchangeable bushings or hollowguiding'centers b,which are designed to guide the rod of material beingoperated upon and to serve as a journal-box for it to revolve in.Guide-flanges G O and 0 care firmly fixed upon the side of the verticalplateB in positionlongitudinally parallel to a line radial from the (Nomodehl center of the socket-hole b and projecting at an inclinationwhich will form an angle of about eighty degrees between their operativesides and the face of the vertical plate B.

It will be observed that the guide-flanges C C are nearer to the radialline from thesoekethole center than are the guide-flanges c c, and thatone of each joined at theirinner ends are next each other,and thusalternate two and two with the guide-flanges D d and D d, which arebolted to the vertical plate B in position, each one parallel to andopposite to one of the guideflanges O or 0 at such distance from it asto form suitable sliding channels or spaces adapted for slidingtool-holders E E and e 6. These guide-flanges D and d are formed, asshown, with a ribfiange projecting at a right angle from the top of theoperative side, which serves to keep the tool'holders E E and e e intheir channels.

The sliding tool-holders E E differ from the sliding holders 6 e in thatthe tool groove or socketf is nearer the right-angled edge in the onethan itis in the other. This is done so as to bring the forward side ofsaid groove in each exactly on aline radial from the center of thesocket-hole b of the vertical plate B and have them alternately reversedas to their right-an gled edges,so as to adapt them to fit in theirrespective spaces between the slides and hold the tools employed sotheir cutting-edges will at all points of their motion be on a lineradial from the center of the socket-hole b in the vertical plate B,also to secure sufficient room between the groovefand the beveled edgeof the tool-holders to receive the set-screw h, which has a large flathead adapting it as the means of clamping tools in the groove orsocketf. Projecting from a central part of the outer face of each of thesesliding tool-holders E or e is a stud, i, which is adapted to engage inthe slot L of one of the forks 7c of a hand-lever, K, which is fulerumedto the vertical plate Bin suitable position to adapt it for theoperation of two of the sliding tool-holders. As is seen, two or more ofthese levers, K,are used if more than two sliding tool-holders are used.These levers are made as shown, their operative ends being forked, so asto extend to each of two of the sliding tool-holders, where they are projusted to take up lost motion.

vided with a slot, is, adapted to engage with the stud i, and, ifdesirable, they are split some distance toward the fulcrum and providedwith a set-screw, s, by which the slot is may be ad- The hand end K ofthe lever K extends forward and is bent to the mostaconvenient position.I

The operation of the device is as follows: The rod of wood to be workedhaving been passed through the hollow spindle of the lathe is passedthrough the bushing b in the vertical plate B, and is then clamped so asto revolve with the hollow spindle ol'the lathe, which may then bestarted. Now,if the hand end ofa lever, K, be depressed, the tool heldby the sliding tool-holder 0 will be advanced against the rod ofmaterial being worked until motion is arrested by the lever K strikingone of the adjustable set-screws P, which are secured in a suitableposition for that purpose on the vertical plate B. If the hand end ofthelever K be now elevated, the sliding tool-holders 6 will be retractedand the sliding chuck E advanced and the tool it carries caused toperform its work on the rod of material until upward motion of the leverK is arrested by another of the set-screws, 19. Thus each pair ofsliding tool-holders maybe operated by a single lever, and,if desirable,more than two pairs may be arranged on the one vertical plate. Itherefore, do not confine myself to the number of sliding tool-holderswhich are here shown.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A compound forming-tool attachment for turning-lathes, consisting ofa vertical plate, as

B, adapted by flanges, such as O and c, for holding and guiding two ormore sliding tool holders, as E and e, in combination with saidtoolholders E and e, and a three-armed lever, as K, fulcrumed to saidvertical plate and adapted to operate said sliding tool-holders, in themanner and for the purpose substantially as described.

2. In a compound forming-tool attachment for turninglathes, a threearmedlever, such as K, which is adapted to operate two sliding tool-holders,such as E and e, in combination with said tool-holders, arranged in themanner and for the purpose substantially as specified.

3. In a compound forming-tool attachment for turning-lathes, thearrangement, as shown and described, of the guiding-flanges G and c andthe sliding tool-holders E and e,with their grooves f, whereby the toolwill at all points of its motion be held withits cuttingedge on a radialline from the center of the sockethole I), in the manner and for thepurpose substantially as described.

4. In a compound forming-tool attachment for turning-lathes, thecombination of the following elements: a vertical plate, as B,guideflanges, as O and a, sliding tool-holders, as E and e, three'armedlever, as K, with a baseplate, as A, and suitable means for securing thesame to alathe-bed.

In testimony that I claim. the foregoing as my invention I have signedmy name in prcs- Witnesses:

ELIAS WHITNEY, E. F. GENNERT.

